Could be people copying answers they want to dissect and understand better and then clicking "Submit" to run against the attempt test cases instead of forking them.

Perhaps you interpreted the question slightly differently, I took it as the ball was being thrown upwards but we were only measuring the position (with some device) every 0.1 s. Therefore, you can still assume the ball to reach a max height at some fraction not at 0.1 s, we just don't have a precise enough measurement to catch this so we're forced to round to 0.1 s because that's the precision of the device.
This is a common limitation for modeling, so I'm confused as to why this isn't a reasonable approach in your view.

Yours is more readable than mine, but my logic is a bit cleaner.

XXL is not a correct roman number.

If you mean 30, it is expressed XXX. Only 40 would be expressed as XL, which works fine

I think when they were unable to make it, unlocked solutions and copied to see how it works

are you an arabic my friend

oh man, you are crazy xD

pretty cool stuff

it's written in python. time complexity doesn't matter there ;)

Similar logic, but much cleaner than mine. Nice!

For example. When I was at the university, together with the teacher, we solved with the whole group.I don’t support copying solutions, then you don’t remember anything.

I find it fascinating how there's always so many people who have the exact same answer as the top solution, character-for-character, and the long tail of similar equivalent solutions if you scroll down that don't have as many votes all have exactly one match. Can't possibly be because people are copying answers on this site, why would people do that and cheat themselves of a learning experience?